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2007-02-28 by Tim Mitchell
Leon wrote: > > RS-485 is one way. You could also daisy-chain the slaves and use the > UARTs, with each slave passing the message onto the next. You will > need some sort of addressing system; when the correct slave > identifies the message, it performs the desired action otherwi
2007-02-28 by Svenn Dahlstrøm
Hi Mago You may take a look at Modbus http://www.modbus.org/specs.php Download 'Modbus Protocol specification' and 'Modbus Serial Line Protocol and Implementation Guide V1.02' This will give you an idea on how to do 1 master and many slaves over RS485 lines, by only addressing th
2007-02-28 by Leon
----- Original Message ----- From: "magzky02" To: Sent: Wednesday, February 28, 2007 7:49 AM Subject: [AVR-Chat] When boyscouts say one for all, all for one > > hello guys, > > i have a system that has 1 master microcontroller that communicates to > 18 slave microcontrollers. I a
2007-02-28 by Tim Mitchell
magzky02 wrote: > hello guys, > > i have a system that has 1 master microcontroller that communicates to > 18 slave microcontrollers. I am going to use a USART in UART mode. > Since the master is using only one UART, there are control lines so > that the communication b/n slave a
2007-02-28 by magzky02
Hello guys my master controller is going to use one UART to communicate with 18 slave controllers. i use i/o control lines to avoid corruption. My question is that is this method reliable? Is there no effect of the 17 others connected to the line when one is communicating to the
2007-02-28 by magzky02
hello guys, i have a system that has 1 master microcontroller that communicates to 18 slave microcontrollers. I am going to use a USART in UART mode. Since the master is using only one UART, there are control lines so that the communication b/n slave and master is one at time to
2007-02-28 by murugesan kudiyarasu
really so sorry , i am working for a concern ,they dont allow me to send the code, any hav i will describe where i face problem ,while using floating point calculation it take more memory, Ralph Hilton wrote: On Mon, 26 Feb 2007 09:40:11 -0000 you wrote: > i am using mega8 for my
2007-02-27 by BobGardner@aol.com
Flash rom is full. Make strings smaller, get AVR with bigger flash? -----Original Message----- From: AVRDevelopment@znet.com To: AVR-Chat@yahoogroups.com Sent: Tue, 27 Feb 2007 3:12 AM Subject: [AVR-Chat] ICC Compiler Error: !E (188) : area 'text' not large enough I keep getting
2007-02-27 by David McNab
Hi, I'm an AVR newbie (converting from PIC), looking to get hold of some ATtiny84/85 devices. One problem is that here in NZ, none of the usual retailers (Sicom, Jaycar, RS, Farnell etc) seem to carry them. The other problem is that DigiKey adds NZ$60 to small NZ orders, in the f
2007-02-27 by AVR Development
I keep getting this ICC compiler error: !E (188) : area 'text' not large enough want size 74 lo 5994 hi 6000 size 7 What does this mean and how do I fix it? Barry [Non-text portions of this message have been removed]
2007-02-27 by Cat C
Thanks John, I just didn't know they were called SUT. Cat ----Original Message Follows---- From: John Samperi Reply-To: AVR-Chat@yahoogroups.com To: AVR-Chat@yahoogroups.com Subject: Re: [AVR-Chat] why my microcontroller usually broken? Date: Tue, 27 Feb 2007 09:55:50 +1100 At 07
2007-02-26 by John Samperi
At 07:15 AM 27/02/2007, you wrote: >BTW - what is the SUT? Start Up Time fuse bits, together with the CKSEL fuse bits land a lot of people in trouble with unusable chips :) Look up the data sheets under "System Clock and Clock Options" Regards John Samperi ***********************
2007-02-26 by Cat C
Thanks John. I don't have a serial, so I didn't know... I only used the studio to program the butterfly, that uses a loader over the serial port, and emulates something... forgot what... You must be that good ;-) I managed to "mis-configure" an ATmega88, as I thought it was a meg
2007-02-26 by John Samperi
At 05:52 AM 27/02/2007, you wrote: >How does the type of programmer affect the confusion? Because one usually has to try and understand all about SUT and other cryptic bits and the fact that a 0 means programmed etc. In Studio you will simply pick a proper oscillator type which i
2007-02-26 by Cat C
>This is a very common problem as people get confused by the >2 types, especially when you use a parallel port type >programmer instead of a serial type connected to Studio >which makes things a lot easier. How does the type of programmer affect the confusion? Thanks, Cat _______
2007-02-26 by John Samperi
At 03:34 PM 26/02/2007, you wrote: >I hooked up the ISP from my AVR Dragon to an ATmega 1281. It won't program >it. This chip is not yet supported as far as I can tell with Studio 4.12 B498. There is a new Studio 4.13 beta around which >> may
2007-02-26 by John Samperi
At 02:04 AM 27/02/2007, you wrote: > i used external clock source from 8 MHz crystal. I was > check external clock to the correct pin. This is still NOT CLEAR. Are you using an external clock source like a canned oscillator feeding into X1 or are you using the external CRYSTAL os
2007-02-26 by Ralph Hilton
On Mon, 26 Feb 2007 09:40:11 -0000 you wrote: > i am using mega8 for my project, i am doing program through code >vision avr compiler ,still i hav 30% to go a head ,but i have only 13% >flash only so any one can help me It would be hard without seeing the code. perhaps you could
2007-02-26 by eka maulana
yes, i used external clock source from 8 MHz crystal. I was check external clock to the correct pin. At the first time the project normaly running, but after last time that project can't running and can't programming. Is the problem caused over current from my powersupply? I used
2007-02-26 by eka maulana
I used buffer 74HC244 in my writer and voltage 5,12 volt. Is that voltage dangerous for the mCU(atmega32L)? The mCu controlled driver stepper motor dan driver DC motor with IC L298. Is the mCU current drop-out? or is the driver motor cause that mcu broken? Thanks for your answer.
2007-02-26 by kudiyarasu_m
i am using mega8 for my project, i am doing program through code vision avr compiler ,still i hav 30% to go a head ,but i have only 13% flash only so any one can help me
2007-02-26 by AVR Development
I hooked up the ISP from my AVR Dragon to an ATmega 1281. It won't program it. Are there fuses which must be set through JTAG or something first? Barry AKA JoeLlama [Non-text portions of this message have been removed]
2007-02-26 by AVR Development
Check the specs of your SSR (look up the datasheet on google if you need to). SSRs usually trigger with 5 or 10 mA (remember, you're just lighting up an LED). Barry AKA JoeLlama -----Original Message----- From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On Behalf
2007-02-26 by dlc
Will the solid state relay take less than 20ma to turn it on? If so, then yes it will work, if not, no. DLC dpintod wrote: > Hello everibody: > Can somebody tell me if I can drive a solid state relay directly from > the tiny12 or I need a transistor. > Thanks, > David. > > > > >
2007-02-26 by AVR Development
Basically, you need to put a resistor inline with your port pin to limit current to the LED input of the SSR (solid state relay). You can get by with 5 or 10 mA nicely :) Gotta figure your voltage drop across the port and also the LED in the SSR which is about 1.2 volts forward d
2007-02-26 by AVR Development
As far as I know you can drive that directly from your ATtiny. You just need like 5 mA or so to drive a solid state relay (SSR). Basically, the input to a solid state relay is an optoisolator so it looks just like an LED to the processor. Barry AKA JoeLlama -----Original Message-
2007-02-26 by Ned Konz
magzky02 wrote: > I made a code to communicate with i2c device and another SMBus device. > I believe the protocol is thesame except for speed. I am doing it > bitbang method. for the i2c, no problem. but i cont adopt my code for > the smbus device. anyone can give me hint on bitb
2007-02-26 by mago Umandam
SMBus is a protocol very similar to i2c. does anyone had implemented SMBus using i/o port? regards mago John Samperi wrote: At 11:54 AM 26/02/2007, you wrote: >I am doing it bitbang method. Are you using the code from AVR300 for it? Don't know about SMbus :( Regards John Samperi
2007-02-26 by John Samperi
At 01:37 AM 26/02/2007, you wrote: > I used eksternal clock 8 MHz for programming my project. What are you using as an external clock source? Is it working and is the external clock being fed to the correct pin? Regards John Samperi ***********************************************
2007-02-26 by John Samperi
At 11:54 AM 26/02/2007, you wrote: >I am doing it bitbang method. Are you using the code from AVR300 for it? Don't know about SMbus :( Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153
2007-02-26 by John Samperi
At 02:15 AM 26/02/2007, you wrote: >Can somebody tell me if I can drive a solid state relay directly from >the tiny12 or I need a transistor. The i/o pins can supposedly drive 20mA, how much current does the solid state relay need to work? Regards John Samperi *******************
2007-02-26 by np np
Sounds like an programming overvoltage problem. Are you sure you have the right volts to program it? www.ckp-railways.talktalk.net/pcbcad21.htm eka maulana wrote: I have a problem with my AVR microcontroller (atmega16, atmega32L and atmega8535L), I used ISP to program this microc
2007-02-25 by magzky02
Hello guys, I made a code to communicate with i2c device and another SMBus device. I believe the protocol is thesame except for speed. I am doing it bitbang method. for the i2c, no problem. but i cont adopt my code for the smbus device. anyone can give me hint on bitbanging smbus
2007-02-25 by eka maulana
I have a problem with my AVR microcontroller (atmega16, atmega32L and atmega8535L), I used ISP to program this microcontroller with CodeVisionAVR. Why did the MCU often broken after being programmed. It happen to MCU ATMega16 and ATMega32L, but not to ATMega8535L. I used eksterna
2007-02-25 by dpintod
Hello everibody: Can somebody tell me if I can drive a solid state relay directly from the tiny12 or I need a transistor. Thanks, David.
2007-02-22 by AVR Development
I'm sure http://www.mouser.com/ and http://www.digikey.com/ carry many IR modules. Once you find a module number you can find other distributors by using www.findchips.com which is good for finding parts including chips. By the way, a good Embedded Systems channel on IRC is #nop
2007-02-22 by John Samperi
At 05:20 PM 22/02/2007, you wrote: >I'm using Atmega8535 and Atmega8515L. Then you have 2 choices, 8 bit mode and 4 bit mode as you have lots of pins to play with. In 8 bit mode just wire 1 of the 8 bit port to the data pins of the lcd, then you need power, a contrast pot and 3 a
2007-02-22 by Riccardo Castellani
I'm using Atmega8535 and Atmega8515L. ----- Original Message ----- From: John Samperi To: AVR-Chat@yahoogroups.com Sent: Wednesday, February 21, 2007 8:48 AM Subject: Re: [AVR-Chat] LCD 4 rows - At 06:07 PM 21/02/2007, you wrote: >How can I link this display to STK500 ? Where can
2007-02-21 by Les Grant
Removed from the list. Regards, Les. On 20 Feb 2007 at 9:44, Jon & Tammy wrote: > ae5k_list wrote: > > --- In AVR-Chat@yahoogroups.com, Anggoro Dwi L wrote: > > > >> Hallo All : > >> I will share tutorial electronics circuit diagram about alarms, > >> > > audio, car, computers, d
2007-02-21 by John Samperi
At 06:07 PM 21/02/2007, you wrote: >How can I link this display to STK500 ? Where can I find linking >diagram ? It depend on which chip you intend to use and also how you will program it. For a Mega8/M48/M88 or M168 you can have a look at one of my circuits at the link below, it
2007-02-21 by castellani.riccardo@tiscali.it
I'm and I'd like doing some test with LCD display 4x20 with my STK500 board, for example to write characters. How can I link this display to STK500 ? Where can I find linking diagram ? Naviga e telefona senza limiti con Tiscali Scopri le promozioni Tiscali adsl: navighi e telefon
2007-02-21 by Jim Wagner
Mostafa - Everything you need is in the data sheet. Jim On Tue, 20 Feb 2007 08:12:40 -0800 (PST) mostafa hajimahdy wrote: > hello > > please i need information full for use serial at AVR > > please send information that for my > thank you > > email: hajimahdy2006@yahoo.com > > >
2007-02-21 by banafsheh ramezani
hi, Codevision environment has a HELP part which helps you to read from or write to Serial Port of AVR microcontroller. Good Luck, mostafa hajimahdy wrote: hello please i need information full for use serial at AVR please send information that for my thank you email: hajimahdy200
2007-02-21 by stevech11
There's a simple IR send/receive with learning, PC interface, PC software with o'scope emulation - using the AVR 90S2313 on AVRfreaks.net, projects section, project "TWIRP". Full C code.
2007-02-20 by John Samperi
At 01:16 AM 21/02/2007, you wrote: >There are dozens of very good websites on internet that do a very good >job of presenting all kinds of circuits in a more professional manner >and without 99% advertising content. Yes BUT the OP would not get any advertisements money for them :
2007-02-20 by Manne Tallmarken
At last, i have found the problem! It was actually very simple to fix, the problem was that the adc was enabled by default on the same pins so the code: ldi TEMP, (1 A couple of years ago I ran into this with an 8051, and my solution > was to simply wait for 20ms. > > The initial
2007-02-20 by Jon & Tammy
ae5k_list wrote: > --- In AVR-Chat@yahoogroups.com, Anggoro Dwi L wrote: > >> Hallo All : >> I will share tutorial electronics circuit diagram about alarms, >> > audio, car, computers, design idea, fun circuits, generator, light, > led, microcontrollers, motor, pc hardware, power
2007-02-20 by mostafa hajimahdy
hello please i need information full for use serial at AVR please send information that for my thank you email: hajimahdy2006@yahoo.com --------------------------------- Expecting? Get great news right away with email Auto-Check. Try the Yahoo! Mail Beta. [Non-text portions of th
2007-02-20 by Don AE5K
codsniper_net wrote, On 02/20/2007 02:17 AM: > Hi all, we are a student group working on a project where we need the > ATMega168 microprocessor and could use some help setting it up. > > We thought we had all the wireings and settings right from the start > but it seems like we c
2007-02-20 by Jim Wagner
The instructions that come with the STK500 (they are buried in "AVR Studio Help") do a pretty good job of explaining what you need to do. Jim On Tue, 20 Feb 2007 08:17:35 -0000 "codsniper_net" wrote: > Hi all, we are a student group working on a project where > we need the > ATMe